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发明名称
Collecteur-filtre pour la reproduction et la retransmission sonores
摘要
申请公布号
FR993444(A)
申请公布日期
1951.10.31
申请号
FRD993444
申请日期
1949.06.27
申请人
发明人
MACEY FRANCOIS
分类号
H04R1/34
主分类号
H04R1/34
代理机构
代理人
主权项
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